<template>
    <div class="list" ref="warpper">
        <div>
            <dl class="area">
                <dt class="title border-topbottom">当前城市</dt>
                <dd>
                    <ul class="button-list">
                        <li class="button-wrapper">
                            <p class="button">{{this.currentCity}}</p>
                        </li>
                    </ul>
                </dd>
            </dl>
            <dl class="area">
                <dt class="title border-topbottom">热门城市</dt>
                <dd>
                    <ul class="button-list">
                        <li class="button-wrapper" v-for="item of hot" :key="item.id" @click="handleCityClick(item.name)">
                            <p class="button">{{item.name}}</p>
                        </li>
                    </ul>
                </dd>
            </dl>
            <div class="">
                <div class="area" v-for="(item,key) of cities" :key="key" :ref="key">
                    <div class="title border-topbottom">{{key}}</div>
                    <div class="item-list">
                        <div class="item border-bottom"  v-for="innderItem of item" :key="innderItem.id" @click="handleCityClick(innderItem.name)">
                            {{innderItem.name}}
                        </div>
                    </div>
                </div>
            </div>
        </div>
    </div>
</template>

<script>
import BScroll from 'better-scroll'
import {mapState,mapMutations} from 'vuex'
export default {
     name: 'CityList',
     props:{
        hot:Array,
        cities:Object,
        letter:String
     },
     computed:{
        ...mapState({
            currentCity:'city'
        })
     },
     methods:{
        handleCityClick(city){
            this.changeCity(city)
            this.$router.push('/')
        },
        ...mapMutations(['changeCity'])
     },
     watch:{
         letter(){
             if(this.letter){
                 const element = this.$refs[this.letter][0]
                 this.scroll.scrollToElement(element,1000)
             }
            
         }
     },
     mounted () {
         this.scroll = new BScroll(this.$refs.warpper)
     }
}
</script>

<style lang="stylus" scoped>
@import '~styles/varibles.styl'
  .border-topbottom
    &:before
      border-color: #ccc
    &:after
      border-color: #ccc
  .border-bottom
    &:before
      border-color: #ccc
  .list
    overflow: hidden
    position: absolute
    top: 1.58rem
    left: 0
    right: 0
    bottom: 0
    z-index 1
    background #fff
    .title
      line-height: .54rem
      background: #eee
      padding-left: .2rem
      color: #666
      font-size: .26rem
    .button-list
      overflow: hidden
      padding: .1rem .6rem .1rem .1rem
      .button-wrapper
        float: left
        width: 33.33%
        .button
          margin: .1rem
          padding: .1rem 0
          text-align: center
          border: .02rem solid #ccc
          border-radius: .06rem
    .item-list
      .item
        line-height: .76rem
        padding-left: .2rem
</style>


